Conference: Main Conference
Forum: SMT Production & Design
Thread: QFN soldering

Date: March 29, 2012 08:28 AM
Author: Bill Axler
Subject: QFN soldering

In the IPC-A-610E standard QFNs are classified as BTC (bottom termination components). Most QFNs do not have a solder-able surface on the outside of the part. Usually the lead that you can see on the outside is copper and classified is not solder-able. On these type of parts no toe solder is required. The only way to truly inspect these type of parts is with an x-ray.

(http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=66084)

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